Phosphonitrilic Chloride

a polymer composed mainly of hexachlorocyclotriphosphazotriene

Freshly produced phosphonitrilic chloride is an amorphous substance that partially crystallizes upon extension. Density, 2.4 g/cm³ at 20°C. It exhibits considerable hyperelastic deformation; elastic modulus, 0.26–0.38 meganewtons per sq m, or 2.6–3.8 kilograms-force per sq cm (it is called inorganic rubber). It is incombustible and stable upon heating up to 300°C, and it hydrolyzes rapidly upon exposure to air, becoming brittle. Organic radicals (for example, C₆H₅, OC₆H₅, OC₂H₅, and NHR) are substituted for C1 atoms in phosphonitrilic chloride to impart resistance to hydrolysis. Such products, which have a molecular weight of 300,000–2,000,000, also have hyperelastic properties and low combustibility; they are soluble in organic solvents, are chemically inert, and undergo depolymerization at temperatures slightly higher than 200°C.

Phosphonitrilic chloride is produced by thermal or catalytic polymerization of the monomer. It is used in the manufacture of rubbers by substituting alkylamino, arylamino, alkoxy, or aryloxy groups for chlorine atoms; vulcanized rubbers made from this base material retain their elastic properties at temperatures down to –70°C.

V. V. KIREEV

单词	phosphonitrilic chloride
释义	Phosphonitrilic Chloride Phosphonitrilic Chloride a polymer composed mainly of hexachlorocyclotriphosphazotriene Freshly produced phosphonitrilic chloride is an amorphous substance that partially crystallizes upon extension. Density, 2.4 g/cm³ at 20°C. It exhibits considerable hyperelastic deformation; elastic modulus, 0.26–0.38 meganewtons per sq m, or 2.6–3.8 kilograms-force per sq cm (it is called inorganic rubber). It is incombustible and stable upon heating up to 300°C, and it hydrolyzes rapidly upon exposure to air, becoming brittle. Organic radicals (for example, C₆H₅, OC₆H₅, OC₂H₅, and NHR) are substituted for C1 atoms in phosphonitrilic chloride to impart resistance to hydrolysis. Such products, which have a molecular weight of 300,000–2,000,000, also have hyperelastic properties and low combustibility; they are soluble in organic solvents, are chemically inert, and undergo depolymerization at temperatures slightly higher than 200°C. Phosphonitrilic chloride is produced by thermal or catalytic polymerization of the monomer. It is used in the manufacture of rubbers by substituting alkylamino, arylamino, alkoxy, or aryloxy groups for chlorine atoms; vulcanized rubbers made from this base material retain their elastic properties at temperatures down to –70°C. V. V. KIREEV
随便看	banknotes banknotes of mexico banknotes of the pound sterling banko bank of afghanistan bank of africa bank of africa-benin bank of alexandria bank of america bankof america bankofamerica bank of america chicago marathon bank of america community development corporation bank of america consumer education fund bank of america corp. bank of america corporation bank of america global capital management bank of america investment services, inc. bank of america merchant services bank of america, n.a. bank of american merrill lynch bank of america nt & sa bank of america precious metals bank of america securities llc bank of america study